References
ANONYMOUS, EL AAIUN PORT, SHIPPING POINT FOR SPANISH SAHARAPHOSPHATE, PHOSPHATE AND POTASSIUM (N.D.)ANONYMOUS, THE BOU CRAA PHOSPHATE MINING COMPLEX: E & MJ,JULY 1980, P. 160, NELSON HAROLD DED., FOREIGN AREA STUDIES:MOROCCO, A COUNTRY STUDY, MARCH 1978.ANONYMOUS, MOROCCO, WORLD MINING, OCT. 1980.ANONYMOUS, PHOSPHATE TRANSPORTATION BY CONVEYOR IN THESPANISH SAHARA, PHOSPHATE AND POTASSIUM.ANONYMOUS, SAHARA, MINERALS YEARBOOK, 1978-9.ANONYMOUS, SPANISH SAHARA PHOSPHATE, PHOSPHATE ANDPOTASSIUM, (N.D.).ANONYMOUS, WESTERN SAHARA: IND. MINS., APRIL 1976.ANONYMOUS, WESTERN SAHARA MINING ANNUAL RIVER 1980, P. 540.BRITISH SULPHUR, WORLD SURVEY OF PHOSPHATE DEPOSITS,3RD, 1973.CALVO, JOAQUIN SAHARA'S PHOSPHATE ROCK AND DISCUSSION OF THESYSTEMS AND METHODS TO MINE BOU CRAA'S DEPOSIT: IXTH WORLDMINING CONGR. FED REP. GERMANY, MAY 1976, P. 11.EMPRESA NACIONAL DEL SAHARA, EXPLORATION OF THE BOU CRAAPHOSPHATE DEPOSIT SPANISH SAHARA: C-XXXXII ECAFE (UNITEDNATIONS) I & NR/F1/49, PT. 2, P. 284-292, (N.D.).FOSFATOS DE BOU CRAA, S/A. (FOSBUCRAA), THE PHOSPHATEDEPOSIT OF BOU CRAA, INSTITUTO NACIONAL DE INDUSTRIA, MADRID1972, P. 54.GREMILLION L. R., CHARACTERIZATION OF PHOSPHATE ROCK FROMSPANISH SAHARA, TVA, SEPT. 24, 1971.IBRD, REPORT ON MOROCCO, 1978.IBRD, REPORT ON WESTERNM SAHARA, 1978.US DEPARTMENT OF AGRICULTURE, MOROCCO-FERTILIZERS ATTACHEREPORT, M01019, MAY 27, 1981.E/MJ, FEB. 1976.E/MJ, MARCH 1974, P. 34.E/MJ, APRIL 1976, P. 27.E/MJ, AUGUST 1975, P. 44.E/MJ, JAN. 1976, P. 147.MINING MAGAZINE, MAY 1976.WORLD MINING, FEB. 1976, P. 33.WORLD MINING, MARCH 1976, P. 78.WORLD MINING, NOV. 1976, P. 79.WORLD MINING, SEPT. 1973, P. 55.WORLD MINING, NOV. 1975, P. 68.MORSE, D.E., 1978, SPANISH SAHARA: U.S.BUREAU OF MINESMINERALS YEARBOOK, 1975, VOL. III, PP. 1163-1164.PHOSPHOROUS & POTASSIUM, NO 150, JULY/AUG, 1987, P. 15.E & MJ, JULY 1980, P. 160.WORLD MINING, OCTOBER, 1980, P. 83.AUSTRALIAN MINING, MARCH 1981, P. 16.E & MJ, SEPTEMBER 1982, P. 236.ENGINEERING AND MINING JOURNAL. MOROCCO. V. 183, NO. 9,SEPT. 1982, P. 236.BRITISH SULPHUR CORPORATION, WORLD SURVEY OF PHOSPHATEDEPOSITS, FIFTH ED., LONDON, 1987, PP. 106-107.